More advances in networks are needed to keep pace with the rapidly changing terminals and applications, as follows:
1) Smart antenna, software radio, together with advanced base station are the key techniques to achieve adaptability of wireless access points to diverse terminals, i.e. to make radio systems and air networks re-configurable.
2) Hierarchical and ubiquitous as well as overlay cellular systems, including picocell, microcell, macrocell, and magecell ones, implement seamless network interconnection of both symmetric and asymmetric nature, and seamless terminal handoff of both horizontal and vertical levels respectively.
3) Network layer hierarchical mobility management based on Mobile IPv6 and Cellular IP brings quick and seamless handoff to terminals. The Mobile IPv6 also presents a great contribution to the adaptability of heterogeneous networks.
4) Ad hoc wireless networks are a kind of self-deployed wireless networks to make networks portable and adaptable, and thus dynamically share unlicensed radio spectrum.
5) Network reconfiguration can be obtained by the reconfiguration of protocol stacks and programmability of network nodes. Thus, it can adapt dynamically to the changing channel conditions and low or high data rate users.
6) Miscellaneous services can be delivered through a mixture of transmission networks including unicast, multicast, and broadcast ones. According to the service types, e.g. real-time attribute, importance, bandwidth demand, or data stream type, multiple levels of QoS can be defined for various services.
7) Network resource can be dynamically allocated to cope with varying traffic load, channel condition, and service environment. Traffic conditions will be dynamically monitored and controlled via techniques such as distributed and decentralized control of network functionalities.
More advances in networks are needed to keep pace with the rapidly changing terminals and applications, as follows: 1) Smart antenna, software radio, together with advanced base station are the key techniques to achieve adaptability of wireless access points to diverse terminals, i.e. to make radio systems and air networks re-configurable. 2) Hierarchical and ubiquitous as well as overlay cellular systems, including picocell, microcell, macrocell, and magecell ones, implement seamless network interconnection of both symmetric and asymmetric nature, and seamless terminal handoff of both horizontal and vertical levels respectively. 3) Network layer hierarchical mobility management based on Mobile IPv6 and Cellular IP brings quick and seamless handoff to terminals. The Mobile IPv6 also presents a great contribution to the adaptability of heterogeneous networks. 4) Ad hoc wireless networks are a kind of self-deployed wireless networks to make networks portable and adaptable, and thus dynamically share unlicensed radio spectrum. 5) Network reconfiguration can be obtained by the reconfiguration of protocol stacks and programmability of network nodes. Thus, it can adapt dynamically to the changing channel conditions and low or high data rate users. 6) Miscellaneous services can be delivered through a mixture of transmission networks including unicast, multicast, and broadcast ones. According to the service types, e.g. real-time attribute, importance, bandwidth demand, or data stream type, multiple levels of QoS can be defined for various services. 7) Network resource can be dynamically allocated to cope with varying traffic load, channel condition, and service environment. Traffic conditions will be dynamically monitored and controlled via techniques such as distributed and decentralized control of network functionalities.
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